Effect of chromium yeast supplementation on performance, reproduction and immune function in pigs Giovanni Savoini, Federica Cheli, Valentino Bontempo, Antonella Baldi, Francesco Fantuz, Iani Politis and Vittorio Dell'Orto Ann. Zootech., 47 4 (1998) 273-278 DOI: 10.1051/animres:19980403